Abstract: The present invention provides apparatus and methods for completing a wellbore using expandable tubulars. In one aspect, the invention includes a tubular member with an expandable portion at a lower end constructed and arranged to be expanded into contact with a previously expanded liner. At an upper end of the tubular is a polish bore receptacle permitting the tubular to be tied back to the surface of the well with production tubing. In another aspect, the invention provides a method of completing a well comprising expanding a liner top into a cased wellbore to hang the liner and, thereafter running a tubular member into the wellbore.

Abstract: A clutching device has a main shaft, a hub, a pushing disk and a transmitting gear. The hub is securely attached to the main shaft and has a shoulder formed on one end of the hub. The pushing disk is securely attached to the hub. The transmitting gear is rotatably mounted on the hub and is sandwiched between the shoulder of the hub and the pushing disk. The transmitting gear has a recess defined in each respective side of the transmitting gear, and two clutch pads are respectively received in the recesses in the transmitting gear and respectively abut the shoulder on the hub and the pushing disk. Accordingly, it is not necessary to replace the transmitting gear when only one of the clutching pads is worn away, such that the cost for maintaining the clutching device in a good operational condition is reduced.

Abstract: The present invention provides apparatus and methods for expanding an expandable sand screen in the wellbore and then fracturing the wellbore. In one aspect of the invention, an expandable sand screen includes a perforated inner pipe and outer shroud. The outer shroud includes a plurality of longitudinal channels that retain their general shape after the expandable sand screen is expanded. In the expanded state, the channels provide a fluid conduit along an area between the screen and the wall of the wellbore. In a subsequent fracturing operation, slurry travels along the conduits permitting communication of the fracturing slurry with hydrocarbon bearing formations.

Abstract: A coupling apparatus (4) for connecting two rotatable shafts (2a, 3a) of a turbocompressor (1) includes a first and a second coupling part (4a, 4b) which form part of the shaft (2a, 3a) or are designed for firm connection to one end section of the shafts (2a, 3a) each. A third coupling part (4c) is designed in disc-shape and is arranged between the first and the second coupling part (4a, 4b). The first, second and third coupling part (4a, 4b, 4c) are firmly connectable to one another. The third coupling part (4c) has a section (41) which projects beyond the first or second coupling part (4a, 4b) in the radial direction and is designed as a bearing disc of an axial bearing (7).

Abstract: A torque transmitter includes (a) a driver, (b) torque transmitting means for transmitting the torque generated by the driver to a follower, (c) a rotary body on the follower side, and (d) a torque reducer that reduces (or discontinues) the torque transmission when excessive torque over a threshold torque value is loaded to the rotary body on the follower side, and the torque limiter has different threshold-torque-values responsive to rotating directions of the rotary body.